Door locking device

Abstract

DOOR LOCKING DEVICE The door locking device prevents the door from opening unintentionally when an impact force is applied, without causing responsiveness problems or reducing the size of the device.The door locking device includes a locking unit (10) and a linking lever (30) comprising: a movable pin (51) which is provided on a housing (1) and held in a normal position by means of a excitation force from a excitation spring (52); the excitation spring (52) which is held in a power accumulation state by engaging with a gripping claw (50a) under normal conditions, and excites the linking lever (30) so that the linking lever (30) passes from an unlocked state to a locked state and maintains the locked state when the power accumulation state is released; and a gripping arm portion (51a) which releases the strain spring (52) from the gripping state with the gripping claw (50a) when the strain spring (52) is in the power accumulation state and the spindle (51) moves against the strain force of the strain spring (52).Figure for the abridged version: 2.

Description

Title of the invention: Door locking device

[0001] BACKGROUND OF THE INVENTION

[0002] 1. Scope of the invention

[0003] The present invention relates to a door locking device which prevents the door of a vehicle from opening unintentionally even when an impact force is applied to the vehicle, for example, in the event of a collision.

[0004] 2. Description of the technique

[0005] Some door locking devices that hold the vehicle door in a closed position relative to the vehicle are configured to prevent the door from opening unintentionally even when an impact force is applied to the vehicle, for example, in a collision. For example, JP 2020-090828 describes a configuration in which an inertial lever is designed to move between a locking position and a retracted position relative to a linkage lever that actuates a locking unit to unlock it. In this door locking device, the inertial lever moves from the retracted position to the locking position when an impact force is applied, causing the linkage lever to move from an unlocked state to a locked state and to remain locked, thus preventing the door from opening unintentionally.

[0006] Furthermore, in such a door locking device in which the linking lever is configured to move from the unlocked to the locked state when the inertial lever is moved, a greater distance must be provided for the inertial lever to move. In other words, to avoid disrupting the operation of the linking lever in the retracted position, the inertial lever must be positioned outside the range in which the linking lever operates. In this configuration, when an impact force is applied, the inertial lever must be moved to the operating range of the linking lever, and then moved further for the linking lever to move from the unlocked to the locked state. The distance the inertial lever must travel is therefore inevitably large.Consequently, there are concerns that it may be responsible for various problems, such as the responsiveness of the door locking device, which requires a certain amount of time between the moment the impact force is applied and the moment the device's linking lever moves to the locked state, as well as the difficulty of reducing the size of the device.

[0007] In view of the problems described above, an object of the present invention is to provide a door locking device capable of preventing the door from opening unintentionally when an impact force is applied, without causing problems of responsiveness or reduction in the size of the device.

[0008] To achieve the above objective, according to the present invention, in a door locking device comprising a locking unit configured to enter a locked state when a door is closed relative to a vehicle body and to limit the movement of the door in an opening direction relative to the vehicle body, while allowing the door to move in the opening direction relative to the vehicle body when it is entered an unlocked state, and a linkage lever mounted on a device body so as to switch between an unlocked state and a locked state, and, in the unlocked state, configured to move the locking unit to the unlocked state when the door is operated to open, and in the locked state, configured to maintain the locking unit in the locked state even when the door is operated to open,The door locking device includes: a pin that is movably mounted on the body of the device and held in a normal position by means of a excitation force from a pin excitation element; an excitation element that is held in a power accumulation state under normal conditions and, when the power accumulation state is released, excites the linking lever so that the linking lever moves from the unlocked state to the locked state and maintains the locked state; and a power accumulation release mechanism that releases the excitation element from the power accumulation state when the excitation element is in the power accumulation state and the pin moves against the excitation force of the pin excitation element.

[0009] According to the present invention, the linking lever is arranged so as to be able to rotate and slide relative to the body of the device, and configured to move from the unlocked state to the locked state by rotating and to move the locking unit to the unlocked state by sliding in the unlocked state, the stressing element is deformed in the power accumulation state and rotates the linking lever to the locked state when the power accumulation state is released, the body of the device has a gripping claw to hold the stressing element in the power accumulation state, and the power accumulation release mechanism has a gripping arm portion formed on the spindle and configured to release a gripping state with the gripping claw by engaging the stressing element when the spindle moves against the stressing force of the spindle stressing element.

[0010] According to the present invention, the connecting lever has a gripping guide surface which deforms the stressing element released from the gripping state with the gripping claw, and displaces the stressing element so that the stressing element engages with the gripping claw when the connecting lever slides in the state of locking, and a spring force from an unlocking spring urging the linkage lever towards the unlocked state acts on the linkage lever.

[0011] According to the present invention, the stressing element is a helical torsion spring which is engaged with the gripping claw by means of an arm part and presses on the linking lever by means of the arm part when the gripping state of the lock with the gripping claw is released, and the body of the device has a gripping return part which guides the arm part so that the arm part engages with the gripping claw when the stressing element is deformed by the linking lever.

[0012] According to the present invention, the stressing element also has the function of maintaining the spindle in a normal position.

[0013] According to the present invention, the stressing element is the helical torsion spring which has a helically wound coil unit and two arm parts extending from the respective ends of the coil unit in a radial direction, and is configured to hold the spindle in the normal position by means of the spring force acting in an axial direction in which the coil unit is compressed and to rotate the linking lever towards the locked state by means of the spring force acting in a torsional direction via the two arm parts. Summary of the invention

[0014] According to the present invention, when a spindle moves against the force exerted by a spindle stress element upon the occurrence of an impact force, a power accumulation release mechanism releases a stress element from its power accumulation state, thereby causing the connecting lever to move from the unlocked state to the locked state and to remain locked. This configuration can prevent the door from opening unintentionally. The above operation simply releases the stress element from its power accumulation state. The connecting lever can immediately move from the unlocked state to the locked state without the need for a specific component that moves within this range.This configuration is therefore advantageous in terms of responsiveness after the application of impact force and reduction in the size of the door locking device, as no significant space is required inside the device. Brief description of the drawings

[0015] [Fig-1] Fig. 1 is a perspective view of a door locking device according to an embodiment of the present invention, viewed from the rear side of a vehicle;

[0016] [Fig.2] The [Fig.2] is a perspective view of an internal configuration of the door locking device of the [Fig.1], viewed from the rear of the vehicle;

[0017] [Fig.3] The [Fig.3] is a rear view of an internal configuration of the door locking device of the [Fig.1], viewed from the rear of the vehicle;

[0018] [Fig.4] The [Fig.4] is a side view of an internal configuration of the door locking device of the [Fig.1] with a locking unit held in an unlocked state, viewed from inside the vehicle;

[0019] [Fig.5] The [Fig.5] is a side view of an internal configuration of the door locking device of the [Fig.1] with the locking unit held in a locked state, viewed from inside the vehicle;

[0020] [Fig.6] The [Fig.6] is a side view of an internal configuration of the door locking device of the [Fig.1] viewed from inside the vehicle, illustrating the device when the impact force is applied with the locking unit held in the unlocked state;

[0021] [Fig.7A] [Fig.7B] Figures 7A and 7B are views of a linkage lever, a pin and a excitation spring element of the door locking device illustrated in Fig.1, viewed diagonally above the rear side of the vehicle, in which Fig.7A is a perspective view of the linkage lever in the unlocked state, while Fig.7B is a perspective view of the same lever when the impact force is applied;

[0022] [Fig.8A] [Fig.8B] Figures 8A and 8B are views of the linkage lever, pin and excitation spring element of the door locking device illustrated in the top side view of the vehicle in Fig.1, in which Fig.8A is a perspective view of the linkage lever in the unlocked state, while Fig.8B is a plan view of the same lever when the impact force is applied;

[0023] [Fig.9A] [Fig.9B] Figures 9A and 9B are views of the linkage lever, pin and excitation spring element of the door locking device illustrated in the [Fig.1] view of the inside side of the vehicle, in which [Fig.9A] is a side view of the linkage lever in the unlocked state, while [Fig.9B] is a side view of the same lever when the impact force is applied;

[0024] [Fig. 1OA] [Fig. 1OB] Figures 10A and 10B are diagonal views of the linkage lever, pin, and excitation spring element of the door locking device illustrated in Fig. 1, viewed from above the rear side of the vehicle, in which Fig. 1OA is a side view when the impact force is applied, while Fig. 1OB is a side view when a handle is actuated to open after the application of an impact force; and

[0025] [Fig. 11] The [Fig. 11] is an enlarged side view of a gripping claw, the load spring element, and the pin of the door locking device of the [Fig. 1], seen from inside the vehicle. DETAILED DESCRIPTION

[0026] A preferred embodiment of a door locking device according to the present invention will now be described below with reference to the accompanying drawings. Figures 1 through 5 illustrate the door locking device in the embodiment of the present invention. The door locking device described here by way of example, although not shown in the drawings, is a device mounted on a front hinged side door located on the right side of a four-wheeled vehicle and configured to control the opening and closing of the side door by changing the engagement state with a strike plate provided on the vehicle body, in response to the operation of a door handle to open the door or the operation of a key to lock or unlock the vehicle. The configuration of the door locking device will now be described in detail.For convenience, the component directions will be indicated according to the direction in which the components are mounted on the vehicle. This door locking device comprises a locking unit 10 and a lock unit 20 housed in a casing 1 constituting the body of the device.

[0027] The locking unit 10 includes a lock 12 arranged to rotate about a locking shaft 11 and a ratchet 14 arranged to rotate about a ratchet shaft 13. The locking shaft 11 and the ratchet shaft 13 extend substantially horizontally along the entire length of the vehicle. In the illustrated example, the locking shaft 11 is provided in an upper portion of the vehicle relative to a strike plate receiving groove 2 formed in the housing 1, while the ratchet shaft 13 is provided in an inner portion of the vehicle relative to the locking shaft 11 and in a lower portion of the vehicle relative to the strike plate receiving groove 2. The strike plate (not shown) engages in the strike plate receiving groove 2 from the inner side of the vehicle in response to a closing operation of the side door.

[0028] The lock 12 has a strike plate contact portion 12a and a hook portion 12b, and is disposed in the unlocked state by being actuated by the force of a lock spring (not shown) in an unlocking direction (clockwise in [Fig. 3]). The term "unlocked" designates a state in which the strike plate contact portion 12a is located at the rear (outside) of the strike plate receiving groove 2 while the hook portion 12b is held retracted above the strike plate receiving groove 2. In the unlocked state, when the side door is closed, the strike plate enters the strike plate receiving groove 2 and enters in contact with the strike contact part 12a. The lock 12 then rotates counterclockwise on the [Fig.3] against the force of the locking spring, which causes the hook part 12b to be positioned on an open end of the strike receiving groove 2.

[0029] The pawl 14 is configured to prevent the lock 12 from rotating in the unlocking direction by engaging with the hook portion 12b when the hook portion 12b of the lock 12 is positioned on the strike plate receiving groove 2. The pawl 14 is actuated by the elastic force of a pawl spring (not shown) in the direction (counterclockwise in [Fig. 3]) enabling it to engage with the lock 12. Therefore, when the strike plate enters the strike plate receiving groove 2 and causes the hook portion 12b of the lock 12 to be positioned on the strike plate receiving groove 2, the force of the pawl spring enables the pawl 14 to engage with the hook portion 12b (locked state), and the locked state is maintained.

[0030] The ratchet 14 is supplied as a single unit with a ratchet lever 14a. The ratchet lever 14a is extended towards the front side of the vehicle from a portion of the ratchet 14 located on the inside relative to the ratchet shaft 13. When the ratchet lever 14a is moved upwards against the force of the ratchet spring, the ratchet 14 rotates clockwise in [Fig. 3], and thus the engagement with the lock 12 can be released. The lock 12, released from its engagement with the ratchet 14, returns to the unlocked position by means of the force of the lock spring (not shown).

[0031] A connecting lever 30 is provided in a lower portion relative to the ratchet lever 14a in the housing 1. The connecting lever 30 has a support engagement hole 31 at one end and a gripping groove 32 extending in a longitudinal direction at the other end. The connecting lever 30 is provided in the housing 1 so that it can be moved vertically when an external handle lever 41 and an internal handle lever 42 are actuated, and can be moved from the unlocked to the locked state by rotating around a shaft extending on the right and left sides of the vehicle through the actuating of the locking unit 20. In the drawing, the connecting lever 30 is represented by dots so that its shape is clearly visible.

[0032] The exterior handle lever 41 is provided in a lower portion relative to the ratchet shaft 13 so that it can be rotated by an exterior lever shaft 41a along the length of the vehicle. Although not shown in the drawings, one end of the exterior handle lever 41 located in an exterior part of the vehicle is coordinated with an exterior side door handle via an operating force transmission element, such as a rod and cable. One end 41b of the exterior handle lever 41 located in the vehicle engages in the support socket hole 31 of the linkage lever 30 and can only rotate accordingly. When the exterior door handle is operated to When opening, the lever of the outer handle 41 rotates clockwise on the [Fig.3] via the operating force transmission element, and thus the connecting lever 30 is moved upwards by the end 41b. When the opening operation of the outer handle is stopped, the lever of the outer handle 41 rotates counterclockwise under the effect of the force of a return spring (not shown) and returns to the normal position, the connecting lever 30 moving downwards.

[0033] The interior handle lever 42 is rotatably mounted in a lower portion relative to the connecting lever 30 by an interior lever shaft 42a extending along the right and left sides of the vehicle. A front end portion 42b located in a front portion is opposed to a lower end surface of the connecting lever 30. Although not shown in the drawings, a lower end of the interior handle lever 42 is coordinated with an interior handle of the side door via an interior cable 43. When the interior door handle is operated to open, the interior handle lever 42 is rotated clockwise in [Fig. 4] via the interior cable 43, and thus the connecting lever 30 is moved upwards via the front end portion 42b of the interior handle lever 42.When the opening maneuver of the inner handle is stopped, the inner handle lever 42 rotates counterclockwise under the effect of the force of a return spring (not shown) and returns to the normal position, the linking lever 30 moving downwards.

[0034] The locking unit 20 includes a locking lever 22 and a sub-locking lever 23 configured to rotate about the axis of a locking shaft 21 extending into the right and left sides of the vehicle. The locking lever 22 and the sub-locking lever 23 are capable of rotating relatively about the axis of the locking shaft 21 within a range permitted by an arched guide groove 22a formed on the locking lever 22. A release spring 24, configured to cause the sub-locking lever 23 to rotate clockwise about [Fig. 4] relative to the locking lever 22, is provided between the locking lever 22 and the sub-locking lever 23. The sub-locking lever 23 is coordinated with the linking lever 30 by engaging a projection 23a with the engagement groove 32.

[0035] The locking lever 22 is connected to an electric motor 25 and a locking cable 26. The electric motor 25 operates to lock and unlock the device in response to the activation of a remote control belonging to a vehicle user. The locking and unlocking operation of the electric motor 25 is transmitted to the locking lever 22 via a worm gear 27 and a worm wheel 28. The locking cable 26 is actuated to Locking and unlocking are achieved by pressing a locking button (not shown) located on the side door. The locking cable 26 is directly connected to the locking lever 22. In the locking unit 20, when the electric motor 25 or the locking cable 26 is activated to unlock, the linking lever 30 is rotated clockwise on the [Fig. 4] via the locking lever 22 and the sub-locking lever 23, which allows the linking lever 30 to stand substantially straight in the unlocked state.On the other hand, when the electric motor 25 or the locking cable 26 is operated to lock, the linking lever 30 is turned counterclockwise via the locking lever 22 and the sub-locking lever 23, causing one upper end of the linking lever 30 to tilt forward into the locked state, as illustrated in [Fig. 5].

[0036] Furthermore, as illustrated in Figures 7A to 11, the door locking device includes a pin 51 and a tension spring (a tensioning element, or a tensioning element of the pin) 52 inside a housing (body of the device) 50 fixed to the housing 1. The pin 51 is provided in a part located outside the linking lever 30, behind the outer handle lever 41, and below the ratchet 14. The pin 51 is arranged so that it is movable only from right to left relative to the housing 50.

[0037] The thrust spring 52 is the helical torsion spring including arm portions 52b and 52c formed at the respective ends of the helical unit 52a. The thrust spring 52 is provided in a portion located below the spindle 51 in the housing 50 with the coil unit 52a arranged in a right-to-left direction. The thrust spring 52 is a spring whose return force is greater than that of the release spring 24. Indeed, the thrust spring 52 has a spring force adjusted such that, when the connecting lever 30 is pushed from the unlocked state to the locked state, the thrust spring 52 moves the connecting lever 30 to the locked state against the release spring force 24 and can maintain the locked state.In the load spring 52, the arm portion (hereafter specifically referred to as the outer arm portion 52b if necessary) located in an outer part is locked to the pin 51. The pin 51, locked to the outer part of the arm 52b, is held in its normal position, located inside relative to the housing 50, by the spring force (the spring force acting in the axial direction in which the coil unit 52a is compressed) of the load spring 52. In addition, the arm portion (hereafter referred to as the inner arm portion 52c if necessary) of the load spring 52, located in an inner part, extends upwards from the coil unit 52a while protruding higher than the upper end of the housing 50. The upper end of the arm portion is . then bent approximately at a right angle inwards to form a pressure contact part 52d. The inner arm part 52c is detachably engaged with a gripping claw 50a provided on the housing 50.

[0038] The gripping claw 50a is formed at the front end of a wall located inside the housing 50 and projects outwards from the outward-facing surface. As illustrated in Figures 8A and 8B, the gripping claw 50a has a locking surface 50b at its rear end and a gripping guide surface 50c at its front end. The locking surface 50b extends substantially perpendicularly to the front-to-back direction and is configured such that the load spring 52 can be held in a deformed state in a torsional direction when the locking surface 50b is engaged with the inner arm portion 52c, and the pressure contact portion 52d can be held in a state of separation from the connecting lever 30 arranged in the unlocked state.When the inner arm portion 52c is released from the locking surface 50b, the torsional force of the load spring 52 moves the inner arm portion 52c forward, and the pressure contact portion 52d presses on the connecting lever 30 from the rear. This operation allows the connecting lever 30 to move from the unlocked to the locked state. The gripping guide surface 50c is extended so as to gradually tilt inward and forward. The grip guide surface 50c is configured such that when the inner arm part 52c of the load spring 52 is released from the locking surface 50b and the pressure contact part 52d comes into contact with the linking lever 30, at the rear of the inner arm part 52c, the grip guide surface 50c is arranged opposite the inner arm part 52c.

[0039] The door locking device is provided with a gripping arm portion 51a on the pin 51 and a gripping return portion 33 on the linkage lever 30. The gripping arm portion 51a extends forward from a front portion of the pin 51 located in an inner portion. This gripping arm portion 51a is located internally relative to the inner arm portion 52c in a state where the inner arm portion 52c of the tension spring 52 is engaged with the locking surface 50b of the housing 50, and can move the inner arm portion 52c outward when the pin 51 is moved outward relative to the housing 50.

[0040] The return portion of the grip 33 is formed on an edge of the connecting lever 30 located in a rear portion and projects so as to gradually incline downwards and backwards, even when the connecting lever 30 is in the locked state. This return portion of the grip 33 is located below the pressure contact portion 52d, which is released from the locking surface 50b when the connecting lever 30 is in a lower portion in the locked state. In this state, the portion The return lever 33 can come into contact with the pressure contact part 52d when the connecting lever 30 is moved upwards. When the connecting lever 30 is moved upwards with the pressure contact part 52d in contact with the return lever 33, the pressure contact part 52d is gradually moved backwards by a tilting effect of the return lever 33.

[0041] In the door locking device configured as described above, when the inner arm portion 52c engages with the locking surface 50b, the tension spring 52 is held in the deformed state in the torsional direction, and the pressure contact portion 52d is held separate from the connecting lever 30. Consequently, when the electric motor 25 or the locking cable 26 is operating to unlock the device, as illustrated in [Fig. 4], the connecting lever 30 is in the unlocked state. From this state, when the outer door handle or the inner door handle is operated to open, the locking unit 10 transitions to the unlocked state, allowing the side door to be opened.

[0042] When the electric motor 25 or the locking cable 26 operates to lock the device, as illustrated in [Fig. 5], the linking lever 30 enters the locked position, while being tilted forward, via the locking lever 22 and the sub-locking lever 23. This configuration prevents the linking lever 30 from contacting the ratchet lever 14a when the linking lever 30 is lifted. Consequently, even when the outer door handle or the inner door handle is operated to open, the ratchet 14 remains engaged with the latch 12, thus keeping the side door closed relative to the vehicle body.

[0043] In the unlocked state of the door locking device described above, when an impact force is applied to the vehicle body, the pin 51 temporarily moves outwards against the spring force (the spring force in the axial direction in which the coil unit 52a is compressed) of the tension spring 52, and consequently the grip arm portion 51a is moved outwards with the pin 51. Therefore, the outward movement of the pin 51 causes the inner arm portion 52c to move outwards via the grip arm portion 51a, thus releasing the grip between the inner arm portion 52c of the tension spring 52 and the locking surface 50b. Consequently, as illustrated in [Fig.[6], the pressure contact portion 52d of the tension spring 52 comes into contact with the connecting lever 30, and thus the force of the tension spring 52 acting in the torsional direction causes the connecting lever 30 to move to the locked state and maintains the connecting lever 30 in the locked state. Therefore, even when the exterior door handle or the . The handle of the inner door is activated to open from this state, there is no risk of the side door opening unintentionally.

[0044] Furthermore, in the operation described above, the pin 51 only needs to move when the inner arm portion 52c of the tension spring 52 is released from its engagement with the locking surface 50b of the gripping claw 50a. Then, the connecting lever 30 immediately transitions from the unlocked to the locked state due to the force of the tension spring 52 applied in the torsional direction. This configuration therefore does not require the movement of any component in the range from the unlocked to the locked state of the connecting lever 30. Consequently, this configuration is advantageous not only in terms of responsiveness between the application of an impact force and the transition of the connecting lever 30 to the locked state, but also in terms of reducing the size of the door locking device, since no significant space is required inside the device.In particular, the door locking device of this embodiment presses on the connecting lever 30 by means of the force of the tension spring 52 acting in the torsional direction, while simultaneously holding the spindle 51 in its normal position using the force of the spring acting in the axial direction in which the coil unit 52a is compressed. In other words, a tension spring 52 functions in two ways: it holds the spindle in its normal position and moves the connecting lever 30 into the locked state. Consequently, this structure reduces the number of components while further reducing the size of the device.Furthermore, since a mechanism for moving the pin 51 by means of an impact force (in the embodiment, the mechanism for moving the pin 51 towards the inner side of the vehicle) and a mechanism for moving the linkage lever 30 from the unlocked state to the locked state (in the embodiment, the mechanism for moving the linkage lever 30 towards the front side of the vehicle) are independent of each other, there is an advantage in making the work of adjusting the respective mechanisms easier.

[0045] As shown in the drawings, when the connecting lever 30, in the unlocked state, is moved to the locked state by means of the force of the load spring 52, the locking lever 22 does not rotate, but the sub-locking lever 23 rotates relative to the locking lever 22 against the force of the unlocking spring 24. The pin 51, which was displaced outwards by the impact force, immediately returns to its normal position thanks to the force of the load spring 52. Therefore, when the exterior door handle or the interior door handle is operated to open after the application of an impact force on the vehicle body, as illustrated in [Fig. 1OB], the connecting lever 30 is moved upwards, while remaining in the locked state. The part The return lever 33 then comes into contact with the pressure contact portion 52d, and the inner arm portion 52c is displaced rearward due to the tilting effect. The rearward-moving inner arm portion 52c is gradually guided outward as it comes into contact with the grip guide surface 50c of the grip claw 50a. Consequently, the inner arm portion 52c is further displaced rearward, and as it passes the locking surface 50b, the inner arm portion 52c is immediately displaced inward by the force of the tension spring 52, and finally returns to the state of contact with the locking surface 50b.Consequently, the connecting lever 30, separated from the pressure contact portion 52d of the tension spring 52, moves to the unlocked state by means of the release spring force 24 via the sub-locking lever 23 and maintains the unlocked state. Therefore, with the door locking device described above, it is possible to prevent the unintentional opening of the side door when an impact force is applied. However, when the exterior door handle or the interior door handle is operated to open, the connecting lever 30 comes into contact with the ratchet lever 14a in response to the second and subsequent opening operations, and the side door can be opened.

[0046] In the embodiment described above, the door locking device mounted on the side door of the four-wheeled vehicle has been described by way of example. However, the present invention is not limited to this embodiment and applies to a door locking device configured to control the opening and closing operations of another type of door in another type of vehicle. In this case, the door locking device is not necessarily provided on the door but may be provided on the vehicle body.

[0047] In the embodiment described above, although the load spring 52 is configured to compress the connecting lever 30 while holding the spindle 51 in its normal position, an element for compressing the connecting lever 30 and an element for holding the spindle 51 in its normal position may be separate components. The load element and the spindle load element are not necessarily implemented by helical torsion springs.

[0048] In the embodiment described above, although the grip claw 50a is provided on the housing 50 mounted on the housing 1 as the body of the device, the grip claw can be provided directly on the body of the device or on the pin.

[0049] EXPLANATION OF SIGNS

[0050] 1: CASE

[0051] 10: LOCKING UNIT

[0052] 20: CLOSING UNIT

[0053] 30: LINKING LEVER

[0054] 33: PART OF RETURN FROM CAPTURE

[0055] 50: CASE

[0056] 50a: GRIP CLAW

[0057] 50b: LOCKING SURFACE

[0058] 50c: GRIP GUIDING SURFACE

[0059] 51: BROCH

[0060] 51 a: GRABBING ARM PART

[0061] 52: SQUEEZE SPRING

[0062] 52a: COIL UNIT

[0063] 52b: OUTER ARM PART

[0064] 52c: INNER ARM PART

[0065] 52d: PRESSURE CONTACT PART

Claims

1. Demands Door locking device which includes a locking unit (10) configured to switch to a locked state when a door is closed relative to a vehicle body and to restrict the door's movement in an opening direction relative to the vehicle body, while allowing the door to move in the opening direction relative to the vehicle body when it is switched to an unlocked state, and a linking lever (30) mounted on a device body so as to switch between an unlocked state and a locked state, and, in the unlocked state, configured to switch the locking unit (10) to the unlocked state when the door is operated to open, and in the locked state, configured to maintain the locking unit (10) in the locked state even when the door is operated to open, the door locking device comprising: a pin (51) which is movably provided on the device body and held in a normal position by means of a excitation force from a pin excitation element; a load element that is maintained in a power accumulation state under normal conditions and, when the power accumulation state is released, loads the connecting lever (30) so that the connecting lever (30) moves from the unlocked state to the locked state and maintains the locked state; and a power accumulation release mechanism that releases the load element from the power accumulation state when the load element is in the power accumulation state and the spindle (51) moves against the load force of the spindle load element; wherein the connecting lever (30) is arranged so that it can rotate and slide relative to the body of the device, and configured to move from the unlocked state to the locked state by rotating and to bring the locking unit (10) to the unlocked state by sliding into the unlocked state, The stressing element is deformed in the power accumulation state and rotates the linkage lever (30) towards the locking state when the power accumulation state is released. The body of the device includes a gripping claw (50a) to maintain the stressing element in the power accumulation state, and the power accumulation release mechanism has a gripping arm portion (51a) provided on the spindle (51) and configured to release a gripping state with the gripping claw (50a) by engaging with the stressing element when the spindle (51) moves against the stressing force of the spindle's stressing element.

2. Door locking device according to claim 1, wherein the linking lever (30) has a gripping guide surface (50c) which deforms the released stressing element from the gripping state with the gripping claw (50a), and moves the stressing element so that the stressing element engages with the gripping claw (50a), when the linking lever (30) slides into the locking state, and a force from an unlocking spring stressing the linking lever (30) towards the unlocked state acts on the linking lever (30).

3. Door locking device according to claim 2, wherein the stressing element is a helical torsion spring which is engaged with the gripping claw (50a) via an arm portion and compresses the linking lever (30) via the arm portion when the gripping state of locking with the gripping claw (50a) is released, and the body of the device includes a gripping return portion (33) which guides the arm portion so that the arm portion engages with the gripping claw (50a), when the stressing element is deformed by the linking lever (30).

4. Door locking device according to claim 1, wherein the stressing element further functions to maintain the pin (51) in the normal position.

5. A door locking device according to claim 4, wherein the stressing element is a helical torsion spring having a coil unit (52a) winding helically and two arm portions extending from the respective ends of the coil unit (52a) in a radial direction, and is configured to hold the spindle (51) in the normal position by means of a spring force acting in an axial direction in which the coil unit (52a) is compressed and to rotate the link lever (30) towards the locked state by means of a spring force acting in a torsional direction via the two arm parts.

Images